Material preparation technology applied in preparation of dissolving pulp by modifying bleached wood pulp
A technology of dissolving pulp and paper pulp, which is applied in the direction of pretreatment with alkaline compounds, natural cellulose pulp/paper, papermaking, etc., can solve the problems of low quality and high cost of dissolving pulp, and achieve easy material preparation process, low cost, The effect of high responsiveness
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Embodiment 1
[0059] A material preparation process suitable for preparing dissolving pulp by modifying bleached wood pulp, comprising the following process steps:
[0060] A. Raw material preparation
[0061] According to the ratio of bleached wood pulp weight to digester volume: 100kg: 1m 3 Prepare raw materials, select bleached wood pulp;
[0062] B. Dispersion and pulping
[0063] Disperse the bleached wood pulp into pulp boards, then mix the bleached wood pulp boards with sodium hydroxide solution, and perform pulping treatment to obtain a mixture of bleached wood pulp and sodium hydroxide solution, that is, pulp porridge, and then perform the next step of impregnation treatment. The pulp concentration of the pulp porridge obtained through pulping treatment is 3%;
[0064] C. Dipping
[0065] impregnating the porridge obtained by dispersing and pulverizing;
[0066] D. Squeeze out liquid
[0067] Squeeze the soaked porridge until the dryness of the porridge is 20%;
[0068] E. s...
Embodiment 2
[0072] A material preparation process suitable for preparing dissolving pulp by modifying bleached wood pulp, comprising the following process steps:
[0073] A. Raw material preparation
[0074] According to the ratio of bleached wood pulp weight to digester volume: 250kg: 1m 3 Prepare raw materials, select bleached wood pulp;
[0075] B. Dispersion and pulping
[0076] Disperse the bleached wood pulp into pulp boards, then mix the bleached wood pulp boards with sodium hydroxide solution, and perform pulping treatment to obtain a mixture of bleached wood pulp and sodium hydroxide solution, that is, pulp porridge, and then perform the next step of impregnation treatment. The pulp concentration of the pulp porridge obtained through pulping treatment is 5%;
[0077] C. Dipping
[0078] impregnating the porridge obtained by dispersing and pulverizing;
[0079] D. Squeeze out liquid
[0080] Squeeze the soaked porridge until the dryness of the porridge is 35%;
[0081] E. s...
Embodiment 3
[0085] A material preparation process suitable for preparing dissolving pulp by modifying bleached wood pulp, comprising the following process steps:
[0086] A. Raw material preparation
[0087] According to the ratio of bleached wood pulp weight to digester volume: 175kg: 1m 3 Prepare raw materials, select bleached wood pulp;
[0088] B. Dispersion and pulping
[0089] Disperse the bleached wood pulp into a pulp board, then mix the bleached wood pulp board with sodium hydroxide solution, and perform pulping treatment to obtain a mixture of bleached wood pulp and sodium hydroxide solution, that is, pulp porridge, and then perform the next step of impregnation treatment, The pulp concentration of the pulp porridge obtained through pulping treatment is 4%;
[0090] C. Dipping
[0091] impregnating the porridge obtained by dispersing and pulverizing;
[0092] D. Squeeze out liquid
[0093] Squeeze the soaked porridge until the dryness of the porridge is 27.5%;
[0094] E....
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